graham



(No Model.) 2 Sheets-Sheet 1; E. H. GRAHAM. POSITIVE SHUTTLE MOTION FORL'OOMS.

No. 466,851. Patented Jam 12, 1892.

(No Model.) 2 Sheets-Sheet 2;

E. H. GRAHAM. POSITIVE SHUTTLE MOTION FOR LOOMS.

No. 466,851. Patented-Jan. 12, 1892,.

UNITED STATES PATENT OFFICE.

EDMUND II. GRAHAM, OF BIDDEFORD, MAINE, ASSIGNOR OF ONE-HALF TO LEVIVVOODBURY, OF IVASHINGTON, DISTRICT OF COLUMBIA.

POSITIVE SHUTTLE-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 466,851, dated January12, 1892.

Application filed September 10, 1890, Serial No. 364,507. (No model.)

To all whom, it may concern: on the line 0c of Fig. 4. Fig. 3 shows twoBe it known that I, EDMUND II. GRAHAM, a views of the shuttle properwith rolls omitted. citizen of the United States, residing at Bid- Fig.4 is a front view of one end of the lay. deford, in the county of Yorkand State of Fig. 5 is an elevation of the traveler, showing 5 5 5Maine, have invented certain new and useful method of attaching it tothe chain. Fig. 6'

Improvementsin Positive Shuttle-Motions for is a plan or top view of topof a portion of Looms; and I do hereby declare the followthe lay withthe hand-rail removed. Fig. 7 ing to be a full, clear, and exactdescription represents the opposite end of the lay from of theinvention, such as will enable others that shown in Fig. 6, the partsbeing dupli- 6o to skilled in the art to which it appertains to cated.

make and use the same. A is the frame of the loom; b, the cam- Myinvention relates to that class of looms shaft; 0, the lay rocker-shaft;D, the lay; cl, having a positive shuttle-motion or a shuttle thelay-sword; r, the reed, and d the handfed by positive mechanism asdistinguished rail. These parts areall well-known parts of 15 from loomswherein the shuttle is shotfrom the loom and need no furtherdescription.

side to side. In the top of the lay is a longitudinal The object of mypresent invention is to groove extending the entire length of thelay,improve the construction of that class of posiwhich is elongated at eachend to support tive shuttle-motion looms wherein theshutshuttle-operating mechanism hereinafter to 2o tle-driver is moved byan endless chain, to be described. A traveler or slide 6 is adaptwhichit is connected by a link. In these ed to run in this groove on guide 6.The looms as hitherto constructed the sprocket-. traveler isreciprocated by means of an endwheels at the ends of the lay were ofsmall less band or sprocket-chain F, which extends diameter and thechannel in Which the chain through the groove in the laybelow the guide2 5 ran was the same width as the sprocket-wheel, e. The chain F passesaround sprocketthereby making the upper part of the lay wide wheels E,one of which is located at each end and heavy. In myloomI narrow upthechanof the lay. In the drawings I have shown nel in which the chainruns, increasing the but one end of the lay; but the opposite enddiameter of the sprocket-wheels, and I conis a duplicate .of the endshown. Two guide- 0 o fine the chain within its channel by means ofwheels E are provided, one on each side of guide-wheels. the chain nearthe sprocketwheel, by which A further object of my invention is toprothe chain is confined within the narrow limvide guides on which theshuttle can run its of the groove. These wheels are pivoted which shallbe independent of the reed and to studs on cross-pieces 6 which arebolted 3 5 which shall yet allow the threads of the warp to the underside of the lay. The traveler to pass through. This I accomplish by seisconnected with the chain by means of a curing two rails to the laydirectly in front of link l, (see Fig. 5,) which is pivoted to a studthe reed, one above and one below, and havin one of the links and to astud Z, projecting pins projected from the edges of the said ing fromthe under side of the traveler. o rails on which the grooved wheels ofthe shut- Motion is imparted to the shuttle f by tle may run, but whichwill allow the warpmeans of an anti-friction wheel or truck (2 threadsto pass. which is pivoted to the traveler. The shuttle f I haveillustrated in the accompanying is mounted on grooved rolls f f f f thefirst v drawings a loom having my shuttle-motion two above and theothers below. The upper 5 in the form which I prefer to use, although Irolls f run on the guide-pins of the guidedo not wish to limit myself tothe exact (le rail g, which pins g fit the grooves of the tails hereinshown. rolls, and the lower rolls run on a similar In the drawings,Figure 1 represents the line of pins fixed in the guide-rail g. The

end view of a loom or so much thereof as is roll c which is pivoted tothe traveler, plays 10c 50 necessary to understand my invention. Fig.between the rolls f of the shuttle and serves 2 is a transverse sectionof a part of the loom to impart the motion of the traveler to the tadshuttle. The cop is held on a spindle reinovably attached to theshuttle. The spindle is formed with a hook-shaped end, which is hookedover the pin t",secured to the shuttle-body for this purpose. (See Fig.3.) The spindle is held in place by means of a spring 2' attached to theshuttle-body and having a curved portion which fits a depression in thehook-shaped end of thespindle directly opposite the pin i. The shuttleis threaded by passing the yarn through the eye 1' The sprocket-wheel Eis supported on the upper end of a shaft 0 which is rotated continuouslyby mechanism which I will now describe. The shaft 0 is journaled inabearing 0 attached to the under side of the lay, and its lower end isstepped in a bearing 0 secured to the end of the rocker; shaft C, whichis extended for that purpose. On the lower end of the shaft 0 is apinion c, which engages a connecting-gear C, which turns loosely on therocker-shaft. A pinion 5 also engages the gear 0, this pinion beingfixed on the lower end of a shaft 12 the upper end of which has a pinion6 which engages a gear Z2, placed on the end of the cam-shaft. The shaft6 is journaled in bearings 19 b", bolted to loom-frame. It will thus beseen that the motion of the cam-shaft is transmitted through a train ofgearing to the sprocket-wheel E and a continuous motion imparted to thesprocket-chain. The relative size of the gear 17 will determine thespeed of the sprocket wheel and chain, and consequently of the shuttle.

The operation of my shuttle-motion is evident from its construction. Asalready shown, a continuous rotary motion is imparted to thesprocket-chain by which the traveler is moved from end to end of thelay. When it reaches the end, the link travels around the sprocketwheel,leaving the traveler stationary, after which the motion is reversed.Itwill thus be seen that by reason of the continuous motion of operativeparts of the device the shuttle may be moved with great rapidity withoutproducing that jar which is occasioned by suddenly reversing the motionof heavy bodies. The traveler and the shuttle are the only parts whichare reciprocated, and hence the shock of reversing will be very slight.The threads of the warp as the shuttle traverses the lay will easilypass between the rolls 6 and f the pins 9 allowing them to lie close tothe rail and out of reach of the grooves of the rolls.

While guides for the grooved rolls composed of pins allow the warp tolie flat on the rail, I do not wish to limit myself to the use of pinsfor this purpose, as other forms of guides may be used with goodresults, dispensing with the pins;

I claim- 1. Ina positive shuttle-motion for looms, a reciprocatingshuttle, grooved rolls between which said shuttle is mounted, andguiderails on which said rolls run, provided each with a row of pinsadapted to enter the grooves of said rolls, in combination,substantiallyas shown.

2. In a positive shuttle-motion for looms, a reciprocating traveler, areciprocating shuttle, grooved rolls on which said shuttle is mounted,guide-rails on which said grooved rolls run, said guide-rails having arow of pins adapted to fit the grooves of said rolls, and ananti-friction roll pivoted to said traveler and adapted to play betweentwo of said grooved rolls and toimpart the motion of said traveler tosaid shuttle, in combination, sub stantially as shown.

3. In a positive shuttle-motion for looms, the combination of a lay, twoguide-rails attached to the said lay, between which guiderails the warppasses, and a reciprocating shuttle mounted on rolls adapted to runbetween and be guided by said guide-rails, substantially as shown.

In testimony whereof I affix my signature in presence of two witne ses.

EDMUND II. GRAHAM.

IVitnesses:

O. H. LEAVITT, S. W. Runs.

